"NO Such interface supported" C# to Excel

[Ruchi Gupta]

Hi All, I am getting this error "NO Such interface supported" when from my C# application I am trying to export rows to Excel. This is a problem only on certain user machines and they are running same vesion of Excel (i.e. 2000) In refernce to Microsoft article http://support.microsoft.com/default.aspx?scid=kb;EN-US;316653[^] I did ILDASM on Interop.Excel.dll in my program files and found that classes with suffix _SinkHelper are all Public. But on that users machine it is private. I am wondering why such inconsistency with the same setup project. Any help and pointers are appreciated. Thanks Ruchi